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Eatente'd Dec. I3, |898.

No. 6|5,6a6.

W. S. DUE.

ELECTRIC LAMP. (Application filed Aug. 12. .1897. Renewed Apr. 29, 169s.)

(N0 Model.)

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W/T/VESSES f UNITED ,STATES PATENT OFFICE.

JWALTER SCOTT DOE, OF JERSEY OITY, NEV JERSEY, ASSIGNOR OF-ONE- HALF TO J OI-IN H. WEASTELL,

OF SAME PLACE.

ELECTRIC LAM P.

SPECIFICATION forming part of Letters Patent No. 615,686, dated December Application filed August 12, 1897, Renewed April 29, 1898. Serial No. 679,256. (No model.)

To @ZZ whom t may con/cern:

Be it known that I, WALTER SCOTT DOE, of Jersey City, in the county of Hudson and State of New Jersey, have invented anew and Improved Electric Lamp, of which the following is a full, clear, and exact description.

The invention relates to electric lamps and batteries, such as shown and described in the Letters Patent of the United States, No. 576,059, granted to me on February 2, 1807.

The object of the present invention is to provide a new and improved electric lamp designed for use as a parlor-lamp, ordinary portable lamp, hand-lamp, bicycle-lamp, signallantern, headlight, dac. and arranged for furnishing a comparatively small but brilliant light for a predetermined time and permitting the user to conveniently recharge the lamp whenever necessary and in a very simple manner.

The invention consists of certi in parts and details and combinations of the same, as will be fully described hereinafter and then pointed out in the claims.

Reference is to be had to the accompanying drawings,forming a part of this specification, in which similar characters of reference indicate corresponding parts in all the iigures.

Figure l is a perspective view of the improvement in the form of a bicycle -lamp. Fig. 2 is a sectional side elevation of the improvement on the line 2 2 of Fig. 3. Fig. 3 is a transverse section of the same on the line 3 3 of Fig. 2. Fig. 4 is a sectional plan view of part of theimprovement, showing the electric connections. Fig. 5 is a perspective View of the anode. Fig. 6 is a similar view of the cathode, and Fig. 7 is an enlarged sectional side elevation of the gas-escape device.

The improved electric lamp is provided with a casing A, preferably made of sheet metal and supporting on one face an ordinary incandescent lamp B,preferablyinclosed within a reflector-casing G, supported from the casing A, as is plainly indicated in the drawings. The incandescent lamp B has one of its contacts B in contact with a plate D, held on the outer face of a b attery-jar E, made of rubber or similar material and adapted to be contained within the casing A. The bulb of the lamp B is held in a spring B2, forming the other contact of the electric lamp with the casing A, on which casing is mounted a switch F, adapted to make contact with the contactpoint D', attached to the battery-jar E, as is plainly indicated in Figs. l and 4. As the lamp-bulb screws into the spring B2 the bulb is pressed with its tact with the plate D to insure a proper contact at all times and to prevent the bulb from jarring out, it being understood that as the bulb screws in the coil of thesprin g the lamp is rendered laterally adjustable to bring the contact-point B' in proper relation to and in firm contact with the contact-plate D on the jar.

The battery-jar E is provided with a hermetically-sealed cover E', and according to the power of the light desired the jar is formed with one or more partitions E2 for dividing the jar into two or more cells. Each of the cells contains a cathode G, in the form of a perforated carbon cylinder, in which extends an exciting iiuid H, filled into the cell through filling-openings E3 in the cover E', the said openings being normally closed by caps E4, screwing in the said openings, as is plainly indicated in Figs. 2 and 3.

The depolarizer is contained in the exciting iiuid or electrolyte, and when the battery is in action it liberates free oxygen, which prevents depolarization and in fact increases the efficiency of the battery.

A perforated non-conducting tube I, of rubber or like material, is suspended within the cathode G and is screwed or otherwise secured with its bare end to the cover E at the illingopenings E3, so that the inside of the said tube registers with the openings, as is plainly` shown in Figs. 2 and 3. Into the perforated tube I is adapted to be dropped an anode J, made of zinc in the form of a cylinder split longitudinally, as is plainly indicated in the drawings, the lower end of the said anode being adapted to rest on the bareend of a conducting-wire K, extending longitudinally through the said tube I, near the lower end thereof, and the side of the anode to engage the longitudinally-extending portion of the same wire lying inside the tube I, the latter contact B firmly in conssy ICG

' portion of the wire being slightly bent, so as to bear upon the side of the anode with a slight spring-pressure. In this manner the anode is suspended in the exciting fluid in the tube, and so that constant contact with the wire K is insured even if the anode should be thrown up while passing over rough places.

Now when the two cells are used, as illustrated in the drawings, then the wire K of one cell is connected by a wire K with the cathode G ofthe othei` cell,as is plainly shown in Fig. 4, and the wire K of the other cell is connected by a wire K2 with the contact-plate D, previously mentioned, and held on the outside of the jar E in contact with the contact-point B of the incandescent lamp B. The cathode G of the first cell is connected by a wire K3 with the contact-point D.

Now it is evident that when the several parts are in the position shown in the drawings and the jar E is partly filled with the exciting fluid, as indicated, and cartridges in the form of zinc cylinders and forming the anodes are dropped into the tubes I then electricity is generated, which passes to the filament in the incandescent lamp B to produce the desired light, it being understood that the switch F is then in contact with the contact-point D.

Now it will be seen that bythe arrangement described the light will be kept burning a length of time corresponding to the size of the anode J used, it being understood that an anode, for instance, of the size indicated in the drawings will furnish light for thirty-six hours in a three-cell battery, and less if the anode is reduced proportionally in size. It will further be seen that in case the anode is entirely dissolved it can be readily replaced by a new one, the operator for this purpose simply unscrewing one of the caps E4 and dropping a ne\T anode down into the tube I through the filling-opening E3.

By the arrangement described the anode will always remain in iirm contact with the bare platinum wire K, so as to insure a constant contact and generation of electricity, and consequently a steady light in the lamp. If the anode should be thrown upward by a jar, it will maintain contact with the longitudinally-extending portion of the wire.

The cap E is provided with a suitable valve L, having a screw L in its top, with a minute hole L2 for permitting the ready escape of any gases generated in the battery-jar E.

The gas-escape valve L is provided with a large chamber L3, so that any liquid splashing up into this chamber readily drains back into the cell, as the air in the chamber will not allow a illing with the liquid and the liquid will not reach the minute outlet-open` ing in the screw L in the top of the valve L, (see Figs. l and 7,) so that the generated gas can at all times escape through said hole. The lower end of the chamber is contracted and formed with an aperture, so that but a small amount of the liquid contained in the jar can be splashed up at a time into the chamber to immediately drain back through the said aperture into the cell, and thus not reach the minute outlet in the screw.

Having thus described my invention, I claim as new and desire to secure by Letters Patentl. An electric lamp comprising a metallic casing, a coiled spring secured at one end in the said casing and into which screws the bulb of the lamp, and a battery having a jar of an insulated material and removably contained in the said casing, the jar having a contact-plate to make a contact with the bulb on placing the battery into the casing, substantially as shown and described.

2. An electric lamp comprising a metallic casing, a coiled spring secured at one end in the said casing and into which screws the bulb of the lamp, a battery having a jar of an insulated material, and removably contained in the said casing, the jar having a contact-plate to make a contact with the bulb on placing the battery into the casing, and a second contact carried by the jar, and adapted to be engaged by a switch on the Casin g, substantially as shown and described.

3. An electric lamp comprising a cartridge or anode of a size according to the length of time the electric light is desired to burn, a perforated non conducting tube provided with a contact for the anode inserted in the said tube, and a hollow cathode in which the said perforated tube with its anode is suspended, and which is adapted to receive an exciting fluid, substantially as shown and described.

4. An electric lamp comprising an incandescent lamp, a battery-jar formed with one or more cells each containing an exciting fluid, a cathode in the form of a hollow perforated cylinder of carbon, a perforated tube of a non conducting material, suspended within the said cathode, an anode adapted to be dropped into the said perforated tube, and a contact-wire held in the said tube and on which rests the said anode, the said contactwire and the cathode being connected with the filament of the electric incandescent lamp, substantially as shown and described.

5. An electric lamp comprising an incalldescent lamp, a battery-jar formed with one or more cells each containing an exciting liuid, a cathode in the form of a hollow perforated cylinder of carbon, a perforated tube of a non conducting material, suspended within the said cathode, an anode adapted to be dropped into the said perforated tube, and a contact-wire held in the said tube and on which rests the saidhanode, the said contactwire and the cathode being connected with the filament of the electric lamp, the said tube being in alinement with the filling-opening in the covering of the battery-jar, to permit ot' dropping the anode into the tube, substantially as shown and described. f

6. An electric lamp comprising an 1ncan- IOO IIG

descent lamp, a battery-jar formed with one or more cells each containing an exciting iiuid, a cathode in the form of a hollow perforated cylinder of carbon, aperforated tube of a non conducting material, suspended Within the said cathode, an anode adapted to be dropped into the said perforated tube, and a contact-Wire held in the said tube and on which rest-s the said anode, the said contactwire and the cathode being connected with the lament of the electric lamp, said tube being in alinement With the illing-opening in the cover of the battery-jar, to permit of dropping the anode into the tube, and the filling-opening being closed by a cap, substantially as shown and described.

7. An electric lamp provided With an air and gas escape valve formed with a chamber having an aperture in its lower end, and a closure for the top of the casing and extending into the same, the said closure being formed with a minute opening for the escape of the gas and the entrance of air to the chamber, the opening preventing any liquid that splashes up into the chamber from passing to and through the closure opening to the outside of the lamp, the aperture in the bottom of the chamber permitting the splashedup liquid to drain back into the cell, substantially as shown and described.

8.A A battery for electric lamps, having a cylinder adapted to receive the anode, a contact-Wire therefor extending down inside said tube, said wire near its lower end passing out through lthe Wall of the tube and then back and across the same, forming a stop to support the anode, substantially as shown and described.

9. A battery for electric lamps, having a cylinderadapted to receive the anode, a longitudinally-extendingcontact-Wire in the cylinder, having its lower end bent to extend across the tube and form a stop for the anode, the intermediate portion of said Wire pressing against the side of the anode and insuring uninterrupted contact, substantially as shown and described.

VALTER SCOTT DOE. 

